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CN-121987257-A - Bone marrow puncture needle

CN121987257ACN 121987257 ACN121987257 ACN 121987257ACN-121987257-A

Abstract

The invention provides a bone marrow puncture needle, which comprises a limiting component, a needle cylinder and a needle core, wherein a second screw rod is arranged on the needle cylinder, a groove perpendicular to a rod body is formed in an outer thread of the needle cylinder, the limiting component comprises a baffle, a grab handle, a nut, a first screw rod and a fixing component, the fixing component is provided with a fixing strip with a spring, the fixing strip is embedded in a limiting groove of the second screw rod, the front end of the fixing strip is provided with a protrusion matched with the groove on the rod body of the second screw rod, the fixing strip is longer than the length of the limiting groove, and the side end of the fixing strip is longer than the height of the limiting groove. When the bone marrow puncture needle is used for performing bone marrow puncture on a patient, the length of the bone marrow puncture needle entering the needle body is measured, the limiting component is adjusted to a required position, the nut is rotated towards the direction of the needle core, so that the fixing strip is compressed inwards, the protrusion on the fixing strip is embedded in the groove on the second screw rod, the nut is screwed up, the limiting component is kept stable at the moment, the bone marrow puncture needle cannot be loosened in the puncture process, and the damage to bone of the patient caused by the fact that the puncture needle is inserted too deeply is avoided.

Inventors

  • WANG LEI
  • YAO LIJUAN
  • ZOU QIU
  • HUANG YUTING

Assignees

  • 苏州市中医医院

Dates

Publication Date
20260508
Application Date
20241106

Claims (7)

  1. 1. The bone marrow puncture needle comprises a limit component (100), a needle cylinder (200) and a needle core (300), wherein the needle cylinder (200) comprises a puncture outer needle (210), a second screw (220), a supporting seat (230), a buckle (240) and a limit hole (250), and an inner cavity of the needle cylinder (200) is hollow; the needle core (300) comprises a puncture inner needle (310), a positioning rod (320) and a needle handle (330), wherein the puncture inner needle (310) is communicated with the inner cavity of the puncture outer needle (210), and the inclined planes of the puncture inner needle and the positioning rod are coplanar; the outer side of the second screw rod (220) is provided with a groove (221) perpendicular to the rod body, The limiting assembly (100) is characterized by comprising a baffle (110), a grab handle (120), a nut (130), a first screw (140) and a fixing assembly (150), wherein the internal thread of the nut (130) is matched with the external thread of the first screw (140); limiting grooves (141) are formed in two opposite sides of the first screw (140); The fixing assembly (150) comprises an L-shaped fixing strip (151), an arc-shaped part attached to the first screw (140) is arranged above the fixing assembly, and a protrusion (154) matched with a groove on the outer side thread of the second screw (220) is arranged at the lower end of the fixing assembly; The inner side of the corner of the L-shaped fixing strip (151) is provided with a spring (152), the tail end of the L-shaped fixing strip is provided with a through hole (153), and the L-shaped fixing strip also comprises a bearing matched with the through hole; The limiting groove (141) on the first screw (140) is provided with holes (142) on the left and right sides of one end close to the grab handle (120), and the diameter of the limiting groove is the same as that of the through hole (153) on the L-shaped fixing strip (151); the length of the shortest side of the L-shaped fixing strip (151) is longer than the height of the limiting groove (141), the length of the longest side is longer than the length of the limiting groove (141), and threads matched with the first screw (140) are arranged on the outer side of the L-shaped fixing strip.
  2. 2. The bone marrow puncture needle according to claim 1, wherein the first screw (140) is provided with a thread on the inner side thereof, which is matched with the second screw (220).
  3. 3. The bone marrow puncture needle according to claim 1, wherein the positioning rod (320) on the needle core (300) is longer than the radius of the needle handle (330) and matches with the limit hole (250) on the needle cylinder (200).
  4. 4. The bone marrow puncture needle according to claim 1, wherein the length of the spring (152) is equal to the height of the limit groove (141).
  5. 5. The bone marrow puncture needle according to claim 1, wherein the length of the limiting groove (141) is smaller than the length from the rightmost side of the nut (130) to the rightmost end of the first screw (140) when the nut (130) is placed at the leftmost end of the first screw (140).
  6. 6. The bone marrow puncture needle according to claim 1, wherein the outer sides of the grab handle (120), the nut (130) and the needle handle (330) are provided with anti-slip patterns.
  7. 7. The bone marrow puncture needle according to claim 1, wherein the limiting assembly (100) is integrally formed with the fixing assembly (150).

Description

Bone marrow puncture needle Technical Field The invention relates to the technical field of medical appliances, in particular to a bone marrow puncture needle. Background Bone marrow aspiration is a medical diagnostic procedure used to obtain bone marrow samples for diagnosis of various diseases such as leukemia, lymphoma, multiple myeloma, anemia, myelodysplastic syndrome, etc. Bone marrow puncture needles are a critical tool for doing this. Bone marrow puncture needles are typically made of stainless steel or titanium alloy with sharp tips and smooth surfaces to reduce tissue damage. The bone marrow puncture needle mainly comprises a needle tube, a needle core, a handle and a connecting piece, wherein a limiting component for confirming the length of the needle tube is easy to loosen when bone marrow puncture is carried out, so that the puncture needle is inserted too deeply, damage is caused to bone of a patient, discomfort of the patient is easy to be aggravated, and on the other hand, the needle core is easy to be ejected out when the bone marrow puncture is carried out due to harder bone of a part of the patient, so that a sleeve is blocked by the bone, and the bone marrow is not smooth to be extracted. Disclosure of Invention The invention aims to solve the defects in the prior art and provides a bone marrow puncture needle. The bone marrow puncture needle comprises a limiting component, a needle cylinder and a needle core, wherein the needle cylinder comprises a puncture outer needle, a second screw rod, a supporting seat, a buckle and a limiting hole, an inner cavity of the needle cylinder is hollow, the needle core comprises a puncture inner needle, a positioning rod and a needle handle, the puncture inner needle is communicated with the inner cavity of the puncture outer needle, the inclined surfaces of the puncture inner needle and the needle handle are coplanar, grooves perpendicular to a rod body are formed in the outer threads of the second screw rod, the limiting component comprises a baffle plate, a grab handle, a nut, a first screw rod and a fixing component, the inner threads of the nut are matched with the outer threads of the first screw rod, limiting grooves are formed in two opposite sides of the first screw rod, the fixing component comprises L-shaped fixing strips, the upper side of the fixing strip is an arc-shaped, the lower end of the fixing strip is provided with a protrusion matched with the groove in the outer threads of the second screw rod, a spring is arranged on the inner side of the corner of the L-shaped fixing strip, the tail end of the L-shaped fixing strip is further comprises a bearing matched with the through hole, the limiting groove in the outer side of the first screw rod is arranged on the inner side of the L-shaped fixing strip, one end is perpendicular to the groove in the groove is formed in the left side and right side of the end of the handle, which is matched with the L-shaped fixing strip is longer than the length of the L-shaped fixing groove in the length of the L-shaped fixing strip is arranged on the side of the fixing groove. Preferably, threads matched with the second screw are arranged on the inner side of the first screw. Preferably, the locating rod on the needle core is longer than the radius of the needle handle and is matched with the limit hole on the needle cylinder. Preferably, the length of the spring is the same as the height of the limit groove. Preferably, the length of the limiting groove is smaller than the length from the rightmost side of the nut to the rightmost end of the first screw when the nut is arranged at the leftmost end of the first screw. Preferably, the outer sides of the grab handle, the nut and the needle handle are all provided with anti-skid patterns. Preferably, the limiting component is integrally formed except the fixing component. Compared with the prior art, the invention has the beneficial effects that: According to the bone marrow puncture needle, when a patient is subjected to bone marrow puncture, the puncture needle is punctured into a bone marrow cavity of the patient, the limiting component is adjusted to a required position, the nut is rotated towards the needle core direction, so that the fixing strip is compressed inwards, the protrusion on the fixing strip is embedded into the groove on the second screw rod, the nut is screwed up, the limiting component is kept stable at the moment and cannot loosen in the puncture process, the puncture needle is prevented from being inserted too deeply to cause damage to bone of the patient, on the other hand, the needle cylinder is provided with the limiting hole matched with the positioning rod on the needle core, when the patient is punctured, the needle core can be fixed in the needle cylinder only by putting the positioning rod into the limiting hole and then pulling the buckle arranged on the needle cylinder, so that the problem that part of bone of the patient